hear the whistle

You were calmly walking around the server, examining the details and jumping from place to place, suddenly seeing a figure you noticed that it was too unnatural, scary eyes... creepy, you decided to approach, she rolled her eyes, first showed you her ears, then tilted her head to the side, and later showed you to close your ears, which meant (do you hear a whistle? Close your ears.) You wrote something in the chat, but she didn't write anything in response, she didn't show up in your chat.